Answer:
<em>They could see how the spaceship is going to launch and how the trip is going to end up. I hope this helped...!</em>
Explanation:
<u>Chemistry</u> can be used for lots of things, for example, <em>engineering</em> and <em>science</em> such as <em>kinetic energy</em> or <em>mechanical energy</em>.
magnesium oxide is: MgO (right side)
so the left side is: Mg + O2
for the equation to be balanced there must be two oxygens on both sides
Mg + O2 = 2MgO
but now the magnesium is uneven, so there must be two magnesiums on each side
the answer is: B) 2Mg + O2 = 2MgO
Hey there!:
Molar mass Lead ( Pb ) = 207.2 g/mol
Therefore:
1 mole Pb --------------------- 6.02*10²³ atoms
? moles Pb -------------------- 2.31*10²¹ atoms
moles Pb = ( 2.31*10²¹ ) * 1 / ( 6.02*10²³ ) =
moles Pb = ( 2.31*10²¹ ) / ( 6.02*10²³ ) =
=> 0.00383 moles of Pb
Hope this helps !
Answer:
Hg(NO3)2 + Na2CO3 --> 2NaNO3 + HgCO3